1. Classify each of the following, as a physical or a chemical change. Give reasons.(a) Drying of a shirt in the sun.(b) Rising of hot air over a radiator.(c) Burning of kerosene in a lantern.(d) Change in the colour of black tea on adding lemon juice to it.(e) Churning of milk cream to get butter.
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A and B are physical changes as they can be reversed because a dry shirt can again become wet. Similarly B option can also be converted.
C, D and E are chemical changes because once kerosene is burnt, we cannot get it back. Similarly, the colour of black tea and the milk cream changed into butter can also not be reversed.
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C, D and E are chemical changes because once kerosene is burnt, we cannot get it back. Similarly, the colour of black tea and the milk cream changed into butter can also not be reversed.
THANK YOU :-)
HOPE IT HELPS........
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